hospital, washington is debating how to handle his prosecution. whiletheobamaadministrationhas agreed to decllay a readingf the miranda rights, the administration is not going along with republicans who are calling for a change in the prosecution play book. >> this man in my view should be designated as a potential enemy combatant and we should be allowed to question him for intelligence gathering purposes. >> literally hundreds of terrorists, those accused of terrorism, have been successfully prosecuted and imprisoned in the united states using the same process that's being used in this case in boston. >> at the same time, lawmakers want to know a lot more about the suspect's dead brother, tamerlan tsarnaev traveled to russia for six months last year after he was brought to the attention of the fbi as a possible islamist extremist. this has added a sharp new angle to the debate over immigration reform. >>> we have new video to share with you tonight. this is home video obtained by nbc news showing surviving bombing suspect dzhokhar tsarnaev competing in a wrestling match in 2009. he'

. >>presidentobamaaddressedthe nation shortly after 3:00 this afternoon our time. as we just noted the fbi is running this investigation and the president says the full federal government will be used to find the person responsible for this attack. we have more from chief investigative reporter tony kovaleski. i know you spend the day talking to your federal law enforcement sources across the country. >> we are hearing there was no active specific target in california that is receiving special attention but everyone stresses that all agencies remain on high alert status. one of the early keys is the fact that they did recover at least one device that did not detonate. that is key because they are skilled at reverse engineering these devices. we are told the sophistication will help determine the potential suspect or suspects. you can bet they are combing through every piece of video and video cameras in that area. federal agents are currently running down leads internationally and domestically and two sources said today is also tax day. we also confirmed there is no individual or individua